Sender: |
|
X-To: |
|
Date: |
Mon, 15 Nov 2004 15:05:05 -0500 |
Reply-To: |
|
Subject: |
|
From: |
|
Content-Transfer-Encoding: |
7bit |
In-Reply-To: |
|
Content-Type: |
text/plain; charset="us-ascii" |
MIME-Version: |
1.0 |
Parts/Attachments: |
|
|
Robert
I do not consider this an unreasonable stress. I would not however
assume the issue is the soldermask until there is some supporting
evidence such as microscopic or SEM photographs characterizing the
failure.
Best regards
Lee
-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Robert Coburn
Sent: Monday, November 15, 2004 2:50 PM
To: [log in to unmask]
Subject: [TN] Solder Mask expectations / pushing the envelope?
Hi T'Netters;
One of my customers stated they were experiencing what sounded like a
shorting problem due to ionic contamination.
Can't tell if the problem originates beneath the mask or not.
The customer was testing assemblies at 85o C, 85% RH, 400 volts for 168
hours.
The question is: is the Customer expecting too much from a Solder Mask?
TIA,
Rob
---------------------------------------------------
Technet Mail List provided as a service by IPC using LISTSERV 1.8e
To unsubscribe, send a message to [log in to unmask] with following text
in
the BODY (NOT the subject field): SIGNOFF Technet
To temporarily halt or (re-start) delivery of Technet send e-mail to
[log in to unmask]: SET Technet NOMAIL or (MAIL)
To receive ONE mailing per day of all the posts: send e-mail to
[log in to unmask]: SET Technet Digest
Search the archives of previous posts at:
http://listserv.ipc.org/archives
Please visit IPC web site
http://www.ipc.org/contentpage.asp?Pageid=4.3.16 for additional
information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100
ext.2815
-----------------------------------------------------
---------------------------------------------------
Technet Mail List provided as a service by IPC using LISTSERV 1.8e
To unsubscribe, send a message to [log in to unmask] with following text in
the BODY (NOT the subject field): SIGNOFF Technet
To temporarily halt or (re-start) delivery of Technet send e-mail to [log in to unmask]: SET Technet NOMAIL or (MAIL)
To receive ONE mailing per day of all the posts: send e-mail to [log in to unmask]: SET Technet Digest
Search the archives of previous posts at: http://listserv.ipc.org/archives
Please visit IPC web site http://www.ipc.org/contentpage.asp?Pageid=4.3.16 for additional information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100 ext.2815
-----------------------------------------------------
|
|
|